lichen ni´tidus a usually asymptomatic chronic inflammatory eruption consisting of numerous glistening, flat-topped, discrete, smooth, commonly skin-colored micropapules, located most often on the penis, lower abdomen, inner thighs, flexor aspects of the wrists and forearms, breasts, and buttocks. Widespread involvement may produce confluence of the lesions, with formation of scaly plaques.

lichen scrofuloso´rum (lichen scrofulo´sus) a form of tuberculid manifested as an eruption of clusters of lichenoid papules on the trunk of children with tuberculous disease.

lichen sim´plex chro´nicusdermatosis of psychogenic origin, marked by a pruritic discrete, or more often, confluent lichenoid papular eruption, usually confined to a localized area. Mechanical trauma, such as scratching or rubbing the area, is a factor in its development. The lesions may arise from normal skin or they may occur as a complication of other forms of dermatitis. Called also circumscribed or localized neurodermatitis and lichen chronicum simplex.

Treatment consists of administration of corticosteroids applied locally as a cream or given by intralesional injection to relieve the pruritus. The area should be protected by light dressings and the patient encouraged to avoid mental stress, emotional upsets, and irritation of the affected area. The application of very hot or very cold compresses may afford temporary relief of the itching. The condition tends to become chronic with unexplained remissions and reappearance of lesions in a different part of the body.

lichen spinulo´sus a condition in which there is a horn or spine in the center of each hair follicle; called also lichen pilaris.

lichen stria´tus a self-limited condition characterized by a linear lichenoid eruption, usually in children.

li·chen scle·ro·'sus et a·tro·'phi·cus

[MIM*151590]

an eruption consisting of pruritic white atrophic papules and plaques that may be discrete or confluent and may contain a central depression or a black keratotic plug microscopically showing epidermal hyperkeratosis and atrophy, superficial dermal edema and homogenization, and mid-dermal inflammation; occurs most commonly in prepubertal and postmenopausal females; vulval involvement was formerly called kraurosis vulvae.

li·chen scle·ro·sus et a·tro·phi·cus

(lī'ken skler-ō'sŭs ă-trō'fi-kŭs)

A chronic eruption, seen chiefly in the anogenital region, consisting of white atrophic papules that may be discrete or confluent and may contain a central depression or a black keratotic plug.

LICHEN SCLEROSUS ET ATROPHICUS

lichen sclerosus et atrophicus

A chronic atrophic skin disorder marked by the appearance of discrete, flat-topped, white papules, which may coalesce and degenerate. The skin affected by the rash, which occurs most often on the vulva, is often thin, shiny, and scarred. Although this condition is not considered precancerous, squamous cell carcinomas arise in 1% to 5% of cases. See: illustration

Symptoms

Itching of the vulva, which may be intractable, is the most common complaint.

Treatment

Potent topical corticosteroids produce remission, but not cure, in the great majority of patients.

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